//题目：宏#define 命令练习(1)
#include<stdio.h>
#define TRUE 1
#define FALSE 0
#define SQ(x) (x)*(x)
void main()
{                           //40表示八进制数40对应的字符，
    int num;                //而八进制的40表示十进制的32，
    int again=1;            //而ASCII码为32的字符正好是空格
        printf("\40:Program will stop if input value less than 50.\n");
    while(again)
    {
        printf("\40:Please input number==>");
        scanf("%d",&num);
        printf("\40:The square for this number is %d \n",SQ(num));
        if(num>=50)
            again=TRUE;
        else
            again=FALSE;
    }
}